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"_2"

"_" HardWareMan . _2 :

. (RAM / RAMDISK / ROM), : RAM / RAMDISK / ROM / STD. " _". "". 3 (""). , . "" . , 32 2 () 3 (""). , , 48 , SD : 32 , . , : , . / :

IOP + 00H
4
U7,
IOP + 04H
4
U6,
IOP + 08H
4
U5, 1
IOP + 0CH
4
U4,
IOP + 10H
4
U3, SPI SD/MMC ( 2)
IOP + 14H
4
U2,
IOP + 18H
2
U1, D7...D0 -
IOP + 1AH
2
U1, D0=0 - , D0=1 -
IOP + 1AH
2
U1, D1=0 - 5 , D1=1 - 8
IOP + 1CH
4
U0, (0...3), .

 

0
0000H...FFDFH
RAM: ,
0
FFE0H...FFFFH
IOP: -
1
0000H...FFBFH
DISK: RAM -
1
FFC0H...FFDFH
RAM: ,
1
FFE0H...FFFFH
IOP: -
2
0000H...7FFFH
ROM: ROM -
2
8000H...FFDFH
RAM:
2
FFE0H...FFFFH
IOP: -
3 (ROM_EN=0)
0000H...7FFFH
ROM: ROM -
3 (ROM_EN=0)
8000H...EFFFH
RAM:
3 (ROM_EN=0)
F000H...F7FFH
IOP: -
3 (ROM_EN=0)
F800H...FFFFH
U7: ( )
3 (ROM_EN=1)
0000H...EFFFH
RAM:
3 (ROM_EN=1)
F000H...F7FFH
IOP: -
3 (ROM_EN=1)
F800H...FFFFH
U7: ( )

:
- - 2 2,5 ();
- - 58080 Z80;
- - 512 ;
- - 48 ;
- - 384 256 VGA 800 600 ;
- - 5 / 8 / 16 "" .


ROM_EN U1.1. 3, ROM_EN=0. "", SD / MMC , , , ( , : , ). , 2 0000H. . "" . 0 U0.0, 1 U0.1, 2 U0.2 3 U0.3 ( ). , "" F7FCH...F7FFH, FFFCH...FFFFH .
. ( ).

__

 

. . ( ).

_2 : 58080 (DD44) Z80 (DD44'). , DD9 (1558) -5 . DD40...DD42 . ( ).

 

"_2"
"_2"
"_2" Vinxru
     
     
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